@article{shinu_singh_nair_2016,  title={Isoniazid and rifampin drug susceptibility testing: application of 2,3,5-triphenyl tetrazolium chloride assay and microscopic-observation drug-susceptibility assay directly on Ziehl-Neelsen smear positive sputum specimens},  volume={20},  ISSN={1413-8670},  url={https://doi.org/10.1016/j.bjid.2015.09.006},  DOI={10.1016/j.bjid.2015.09.006},  number={1},  journal={Brazilian Journal of Infectious Diseases},  publisher={Brazilian Society of Infectious Diseases},  author={Shinu, Pottathil and Singh, Varsha and Nair, Anroop},  year={2016},  month={Jan},  pages={33–40} }